1. the quality or state of being straight; not curved, bent, or crooked
2. the quality of being honest, direct, or forthright

Examples

• The carpenter checked the straightness of the board with a level.
• The road's straightness made it easy to drive at high speeds.
• She admired the straightness of the fence posts.
• His straightness in business dealings earned him respect.
• The straightness of her answer surprised everyone.
• The ruler's straightness was perfect for drawing lines.
• I appreciate your straightness about the situation.